5.6

CVE-2025-53500: malvineous masseditregex Cross-site Scripting

CVSS: 5.6v3.1MediumAnalyzed
Published 03-07-2025Last modified 10-07-2025
Open JSON

Vulnerability summary

CVE-2025-53500 is a medium (CVSS 5.6) Cross-site Scripting vulnerability in malvineous masseditregex. EPSS estimates a 0.28% chance of exploitation in the next 30 days, higher than 18.9% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
32/100
0100
Medium · default modelHow is this calculated?
CVSS score
5.6/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.28%
0%100%
Low · +0.03 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Timeline

  1. 03-07-2025
    PublishedVulnerability first disclosed.
  2. 10-07-2025
    Last modifiedVulnerability information updated.

Description

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation Mediawiki - MassEditRegex Extension allows Stored XSS.This issue affects Mediawiki - MassEditRegex Extension: from 1.39.X before 1.39.12, from 1.42.X before 1.42.7, from 1.43.X before 1.43.2.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.28%

Chance of exploitation in the next 30 days

Percentile

19%

Versus all other CVEs

30-day change

+0.03 pp

From 0.24% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.28%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (phabricator.wikimedia.org)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Malvineous1 product
Wikimedia foundation1 product

2 vendors · 2 products

References

2 links